Tribar - Source Code

Tribar Optical Illusion in a small snippet of code
Author: eFishAnt
File size: 1K
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REBOL [
    Author: "Steve Shireman, the eFishAnt"
    email: steve@efishantsea.com
    Comment: {Maybe the code is smaller than the title of this...;-)
        This is the optical illusion that the eyes can never solve...they remain fooled.
        Escher used this in several of his famous drawings...the waterfall, the staircase...}
]

view center-face layout [box 212x260 effect [draw [
    pen red 
    p: 'polygon 0x40 b: 0x240 a: 140x160 104x140 f: 36x180 e: 36x20
    p b 36x260 c: 208x160 d: 68x80 68x120 a 
    p c 208x120 e f 68x160 d
]]]